Codecademy, popular online interactive platform that offers coding classes in programming languages like Python, Java, JavaScript, Ruby, SQL, Html, CSS added "Introduction to Blockchain" course. In this course you can learn about fundamental blockchain concepts and build a small blockchain of your own in Python.

"In this course, you'll learn the structure and properties of the blockchain itself and the individual blocks that make it up. You'll understand the blockchain features that provide security between different blockchain participants. You'll visualize different aspects of the blockchain and create and tamper with your own blocks through interactive simulations.

If you have some Python experience, you'll be able to build a small blockchain library in Python, including a Blockchain class and a Block class. Add functionality to add blocks, create hashes, and verify the chain."